BiCoO3 is a perovskite type material recently prepared by high pressure-high temperature synthesis in Kyoto. It has a distorted acentric perovskite structure with order of high spin Co3+ moments. At 3GPa, BiCoO3 undergoes a metal-insulator transition accompanied by a first order structural transition (observed by energy-dispersive X-ray diffraction from a Diamond Anvil Cell sample). However, the Co3+ spin state and superstructure in the high pressure state are unclear. Neutron diffraction is needed to determine the atomic (especially oxygen) positions in the high pressure phase, and to determine whether magnetism is suppressed as expected for a transition to to the low spin S = 0 state of Co3+.